J. Berge defined the family "doubly-primitive" knots that yield
lens spaces by Dehn surgery, and classifying as several families
and listed up them. I will point out that most of such knots are
"divide knots" defined by N. A'Campo, and are presented by
L-shaped plane curves. By such presentation, we can study
the structure of Berge 's knot family more.
In this talk, I will talk about subfamilies (Berge's type I to VI)
of knots in a solid torus yielding solid torus by Dehn surgery.